# Contributor: Rasmus Thomsen <oss@cogitri.dev>
# Contributor: Martell Malone <martell@marinelayer.io>
# Contributor: Travis Tilley <ttilley@gmail.com>
# Contributor: Mitch Tishmack <mitch.tishmack@gmail.com>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Ariadne Conill <ariadne@dereferenced.org>
# Contributor: omni <omni+alpine@hack.org>
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
_pkgname=llvm
pkgver=17.0.6
_majorver=${pkgver%%.*}
_prevmajorver=$((_majorver - 1))
pkgname=$_pkgname$_majorver
pkgrel=2
pkgdesc="Low Level Virtual Machine compiler system, version $_majorver"
arch="all"
url="https://llvm.org/"
license="Apache-2.0"
depends_dev="$pkgname=$pkgver-r$pkgrel libffi-dev zlib-dev zstd-dev"
# See https://gitlab.alpinelinux.org/alpine/aports/-/commit/51d2fba931fb2ef0046dea19405a9290c8735051#note_234651
[ -z "$BOOTSTRAP" ] && depends_dev="$depends_dev $pkgname-test-utils=$pkgver-r$pkgrel"
makedepends_host="$depends_dev binutils-dev libxml2-dev"
makedepends_build="cmake chrpath python3 py3-setuptools samurai"
# diffutils for diff: unrecognized option: strip-trailing-cr
# coreutils for 'od' binary
checkdepends="bash coreutils diffutils"
subpackages="
	$pkgname-gtest:_gtest
	$pkgname-static
	$pkgname-libs
	$pkgname-linker-tools:linktools
	$pkgname-dev
	$pkgname-test-utils-pyc
	$pkgname-test-utils:_test_utils
	"
source="https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-project-$pkgver.src.tar.xz
	0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
	allocscore.patch
	fix-memory-mf_exec-on-aarch64.patch
	install-prefix.patch
	llvm-stack-size.patch
	rust-feature-tables.patch

	0001-Revert-Pseudo-Probe-Make-.pseudo_probe-GC-able.patch
	fix-hexagon-tests.patch
	workaround-codegen-riscv-xtheadmempair-miscompile.patch
	Revert-LoongArch-Support-InlineAsm-for-LSX-and-LASX.patch
	"
builddir="$srcdir/$_pkgname-project-$pkgver.src"

# Whether is this package the default (latest) LLVM version.
_default_llvm="no"

# If crosscompiling, we need llvm-tblgen on the build machine.
if [ "$CBUILD" != "$CHOST" ]; then
	_llvm_tblgen="llvm-tblgen"
	if [ "$_default_llvm" = no ]; then
		_llvm_tblgen="llvm$_majorver-tblgen"
	fi
	makedepends_build="$makedepends_build cmd:$_llvm_tblgen"
	cmake_cross_options="
		-DCMAKE_CROSSCOMPILING=ON
		-DLLVM_TABLEGEN=/usr/bin/$_llvm_tblgen
	"
fi

if [ "$_default_llvm" = yes ]; then
	provides="llvm=$pkgver-r$pkgrel"
	replaces="llvm"
fi

# explicit override for previous version as well
replaces="llvm16"

# NOTE: It seems that there's no (sane) way how to change includedir, sharedir
# etc. separately, just the CMAKE_INSTALL_PREFIX. Standard CMake variables and
# even  LLVM-specific variables, that are related to these paths, actually
# don't work (in llvm 3.7).
#
# When building a software that depends on LLVM, utility llvm-config should be
# used to discover where is LLVM installed. It provides options to print
# path of bindir, includedir, and libdir separately, but in its source, all
# these paths are actually hard-coded against INSTALL_PREFIX. We can patch it
# and move paths manually, but I'm really not sure what it may break...
#
# Also note that we should *not* add version suffix to files in llvm bindir!
# It breaks build system of some software that depends on LLVM, because they
# don't expect these files to have a sufix.
#
# So, we install all the LLVM files into /usr/lib/llvm$_majorver.
# BTW, Fedora and Debian do the same thing.
#
_prefix="usr/lib/llvm$_majorver"

prepare() {
	default_prepare

	cd llvm

	# Known broken test on musl
	rm -v test/CodeGen/AArch64/wineh4.mir
	# https://github.com/llvm/llvm-project/issues/47657
	rm -v test/ExecutionEngine/Interpreter/intrinsics.ll

	case "$CARCH" in
	x86|arm*)
		rm -v test/Object/macho-invalid.test \
			test/tools/llvm-size/radix.test \
			test/ExecutionEngine/frem.ll
		;;
	esac
}

build() {
	# Auto-detect it by guessing either.
	local ffi_include_dir="$(pkg-config --cflags-only-I libffi | sed 's|^-I||g')"

	local zstd=ON
	# tries linking host libzstd in cross
	if [ -n "$BOOTSTRAP" ]; then
		zstd=OFF
	fi

	# NOTE: DO NOT change CMAKE_BUILD_TYPE! Buildmodes like None will enable
	# debug assertions for LLVM!
	cmake -B build -G Ninja -Wno-dev -S llvm \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=/$_prefix \
		-DCMAKE_INSTALL_RPATH=/$_prefix \
		\
		-DLLVM_DEFAULT_TARGET_TRIPLE="$CBUILD" \
		-DLLVM_HOST_TRIPLE="$CHOST" \
		\
		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
		-DLLVM_APPEND_VC_REV=OFF \
		-DLLVM_BINUTILS_INCDIR=/usr/include \
		-DLLVM_BUILD_DOCS=OFF \
		-DLLVM_BUILD_EXAMPLES=OFF \
		-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
		-DLLVM_BUILD_LLVM_DYLIB=ON \
		-DLLVM_BUILD_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLLVM_ENABLE_ASSERTIONS=OFF \
		-DLLVM_ENABLE_DUMP=ON \
		-DLLVM_ENABLE_EH=ON \
		-DLLVM_ENABLE_FFI=ON \
		-DLLVM_ENABLE_LIBCXX=OFF \
		-DLLVM_ENABLE_LIBEDIT=OFF \
		-DLLVM_ENABLE_PIC=ON \
		-DLLVM_ENABLE_RTTI=ON \
		-DLLVM_ENABLE_SPHINX=OFF \
		-DLLVM_ENABLE_TERMINFO=ON \
		-DLLVM_ENABLE_ZLIB=ON \
		-DLLVM_ENABLE_ZSTD=$zstd \
		-DLLVM_INCLUDE_BENCHMARKS=OFF \
		-DLLVM_INCLUDE_EXAMPLES=OFF \
		-DLLVM_INSTALL_GTEST=ON \
		-DLLVM_INSTALL_UTILS=ON \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		-DLLVM_USE_PERF=ON \
		$cmake_cross_options

	cmake --build build

	python3 llvm/utils/lit/setup.py build
}

check() {
	LD_LIBRARY_PATH="$PWD/build/lib" \
	ninja -C build check-llvm
}

package() {
	depends="$pkgname-linker-tools=$pkgver-r$pkgrel"
	DESTDIR="$pkgdir" cmake --install build
	python3 llvm/utils/lit/setup.py install --root="$pkgdir"

	cd "$pkgdir"/$_prefix

	# Symlink files from /usr/lib/llvm*/bin to /usr/bin.
	mkdir -p "$pkgdir"/usr/bin
	local name newname path
	for path in bin/*; do
		name=${path##*/}
		# Add version infix/suffix to the executable name.
		case "$name" in
			llvm-*) newname="llvm$_majorver-${name#llvm-}";;
			*) newname="$name$_majorver";;
		esac
		# If this package provides=llvm (i.e. it's the default/latest
		# llvm package), omit version infix/suffix.
		if [ "$_default_llvm" = yes ]; then
			newname=$name
		fi
		case "$name" in
			FileCheck | obj2yaml | yaml2obj) continue;;
		esac
		ln -s ../lib/llvm$_majorver/bin/$name "$pkgdir"/usr/bin/$newname
	done

	mkdir -p "$pkgdir"/usr/include "$pkgdir"/usr/lib/cmake

	# symlink include to /usr/include/llvm$_llvmver
	ln -sfv ../lib/$pkgname/include "$pkgdir"/usr/include/$pkgname

	# symlink cmake dir to system cmake
	ln -sfv ../$pkgname/lib/cmake/llvm "$pkgdir"/usr/lib/cmake/$pkgname
}

_gtest() {
	pkgdesc="LLVM $_majorver gtest static libraries"
	depends=""
	_common_subpkg
	amove "$_prefix"/lib/libLLVMTesting*.a \
		"$_prefix"/lib/libllvm_gtest*.a \
		"$_prefix"/include/llvm-gmock \
		"$_prefix"/include/llvm-gtest
}

static() {
	pkgdesc="LLVM $_majorver static libraries"
	depends=""
	_common_subpkg
	amove "$_prefix"/lib/*.a
}

libs() {
	pkgdesc="LLVM $_majorver runtime library"
	depends=""
	local soname="libLLVM-$_majorver.so"
	local soname2="libLLVM-$pkgver.so"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	# libLLVM should be in /usr/lib. This is needed for binaries that are
	# dynamically linked with libLLVM, so they can find it on default path.
	mkdir -p "$subpkgdir"/usr/lib
	mv "$pkgdir"/$_prefix/lib/$soname "$subpkgdir"/usr/lib/
	ln -s $soname usr/lib/$soname2

	# And also symlink it back to the LLVM prefix.
	mkdir -p $_prefix/lib
	ln -s ../../$soname $_prefix/lib/$soname
	ln -s ../../$soname $_prefix/lib/$soname2
}

linktools() {
	_common_subpkg
	pkgdesc="$pkgdesc (linker plugins)"

	amove \
		$_prefix/lib/libLTO.so* \
		$_prefix/lib/LLVMgold* \

	if [ "$_default_llvm" = yes ]; then
		ln -sfv llvm$_majorver/lib/LLVMgold.so "$subpkgdir"/usr/lib/
		ln -sfv llvm$_majorver/lib/libLTO.so "$subpkgdir"/usr/lib/

		# for bfd to work with clang -flto, you need to put the linker plugin in the bfd dir too,
		# not just usr/lib.
		mkdir -p "$subpkgdir"/usr/lib/bfd-plugins/
		ln -sfv ../llvm$_majorver/lib/LLVMgold.so "$subpkgdir"/usr/lib/bfd-plugins/
	fi
}

dev() {
	_common_subpkg
	default_dev
	cd "$subpkgdir"

	amove \
		$_prefix/lib \
		$_prefix/bin/llvm-config

	if [ "$_default_llvm" = yes ]; then
		ln -sf llvm$_majorver usr/lib/cmake/llvm
		ln -sf llvm$_majorver/lib/LLVMgold.so "$pkgdir"/usr/lib/
		ln -sf llvm$_majorver/lib/libLTO.so "$pkgdir"/usr/lib/
	fi

	# also add a suffix-version variant of llvm-config, as that's what things normally check for
	mkdir -p "$subpkgdir"/usr/bin/
	ln -sfv ../lib/llvm$_majorver/bin/llvm-config "$subpkgdir"/usr/bin/llvm-config-$_majorver
}

_test_utils() {
	pkgdesc="LLVM $_majorver utilities for executing LLVM and Clang style test suites"
	depends="python3"
	_common_subpkg

	local litver=$(python3 "$builddir"/llvm/utils/lit/setup.py --version 2>/dev/null \
		| sed 's/\.dev.*$//')
	test -n "$litver"
	provides="$provides lit=$litver-r$pkgrel"

	amove usr/lib/$pkgname/bin/FileCheck \
		usr/lib/$pkgname/bin/count \
		usr/lib/$pkgname/bin/not \
		usr/lib/python* \
		usr/bin/lit

	mv "$subpkgdir"/usr/bin/lit "$subpkgdir"/$_prefix/bin/lit
	ln -s lit "$subpkgdir"/$_prefix/bin/llvm-lit

	if [ "$_default_llvm" = yes ]; then
		amove usr/bin/count usr/bin/not
		ln -s ../lib/llvm$_majorver/bin/lit "$subpkgdir"/usr/bin/lit
	else
		amove usr/bin/count$_majorver usr/bin/not$_majorver
	fi
}

_common_subpkg() {
	if [ "$_default_llvm" = yes ]; then
		replaces="llvm${subpkgname#"$pkgname"} llvm${_prevmajorver}${subpkgname#"$pkgname"}"
		provides="llvm${subpkgname#"$pkgname"}=$pkgver-r$pkgrel"
	fi
}

sha512sums="
6d85bf749e0d77553cc215cbfa61cec4ac4f4f652847f56f946b6a892a99a5ea40b6ab8b39a9708a035001f007986941ccf17e4635260a8b0c1fa59e78d41e30  llvm-project-17.0.6.src.tar.xz
84ed6b165445d0cdb59daa59f612a7d960bf67b13a1b19bdd2a19d46548013e756faca6b8249cb6c60354f3a9aaef46652e5f531944c71294e46d2f7bfd8b832  0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
ef63d5e01440cff65c10b84b65099bbd539bae72065d5581a8d2409cf2d0d4410d5bb3f501273ab29ee65bf8f5d23653a074428c2711ff9209324de56b857f3f  allocscore.patch
1826a6877d0c9e93c2d6ce0b4f83fe1118b9449f82f1919b37be5fc6d7c11ae22e0c02a7d3e6e23ce41bbb07df2ff08124aa9172e254ef2b12ecbc80d9a674a9  fix-memory-mf_exec-on-aarch64.patch
ebc0be314c129ef38f00c8c2be9d589658cae89ac8cda109e35933b5044e775a3d370c0c584d3e501e4d43167b8523d8c5e5a85653d8ebe853571697ae40fb35  install-prefix.patch
2123f01d8075a15cf8c2d8091fc8c92cb99807b1d654af13b436690ddb55f3e893a494593b3c92aeab26e50db4e0500ac688129ab6bc11e4765c0308b90db101  llvm-stack-size.patch
84d2cc5c0376d8a8a2bbc0891849c9421feaea5b38a329aecdb822c136f7ded7ab4c3b87838d8915e6eb54cfe89f3e88f3b81ae98733e9a58d935be74a3c456c  rust-feature-tables.patch
58a4887feedb72f2aa286b396f91348a6730028c358686701c30e084dd968de9597d86373e118c865f0b495d201e094bb0a2cdc19ede49d9f60e34eb7b0b71dc  0001-Revert-Pseudo-Probe-Make-.pseudo_probe-GC-able.patch
bd51d487c46472963a350cd90f7d7a5d8a4494467716f4e4e3d21ba6be5f65c0e84f173a5bb8468fb68325e75401f08110f8886320d5caa9acd339d795b254bc  fix-hexagon-tests.patch
7367b26f263cb0d36a358b79fe41256b4e8632170f3955e00aeeac3ccc6c3ae5dc370d596370bcf8c6b847473f02445fd1de7e6af36de6bd34b87995736fbf16  workaround-codegen-riscv-xtheadmempair-miscompile.patch
aaf99948c2b22e00e5244a0302bd98f541650d9b0bff576de9704a63e3bc2c0acb6a6f667898dbae92884062cefff3f8600fec47cf268e520c636ee903a03a92  Revert-LoongArch-Support-InlineAsm-for-LSX-and-LASX.patch
"
